With spring-loaded safety valve performance characteristics introduced

Spring-loaded safety valve with radiator is mainly suitable for high temperature and pressure environment, the main models are A48Y, A48SH, A48SB, A40Y and so on. Flange safety valves like A41, A42, etc. can also be equipped with a radiator under special requirements. With spring-type safety valve with a radiator for operating temperature "C" ≤ 425 ℃; "I" ≤ 500 ℃; "V" ≤ 500 ℃ steam and other media equipment or piping, as overpressure protection device. Connecting flange standard press JB / T ...... 94 series 1, series 2. Spring-loaded safety valve with radiator commonly used in power station boiler operation, is an effective protection of power plant boilers, is the most important and last safety relief device. In recent years, the state attaches more importance to the safety of boilers and pressure vessels, as well as the implementation of energy-saving emission reduction, high-temperature high-pressure safety valve safety, sealing, back seat sensitivity, energy-saving and put forward higher requirements.

As we all know, the working status of the safety valve depends mainly on the sensitivity of the spring. Spring is one of the key parts of the safety valve, the quality of which directly affects the safety valve performance is good and bad, so the safety valve spring with the general equipment used in the spring compared with some special high requirements. The setting pressure of the safety valve is obtained by adjusting the amount of compression of the spring. When the size of the safety valve has been determined, the stiffness of the spring determines whether the discharge pressure, the relief pressure, the opening height and the mechanical property of the safety valve can be satisfied Relevant standards.

Safety valve action performance is stable (especially at high temperatures), spring design matching and manufacturing quality plays an extremely important role. Shanghai Wuyue safety valve manufacturers will be used within each nominal pressure range of the spring is divided into a number of pressure levels (that is, with a number of springs), it is clear that the more points, the more the number of springs, the actual use of each spring The more accurate the stiffness, the easier it is to operate the safety valve. However, the spring material is generally based on the medium and temperature to determine. Safety valve material, the domestic manufacturers usually use 50CrVA, for corrosive media, are generally used 50CrVA surface spray Teflon, but only for temperatures less than or equal to 200 ° C operating conditions, higher than 200 ° C Another corrosion or low temperature conditions, the general use of 304,316 stainless steel or Inco nickel material. For high temperature and high pressure safety valve (such as steam station superheated steam drum), such as the use of 50CrVA material, you need to add insulation to isolate the spring chamber, or the bonnet is designed to open, can also use 30W4Cr2VA, W1804V and other high temperature Spring steel.

This shows that the spring-loaded safety valve with a radiator is mainly suitable for high temperature and pressure work environment, the purpose is to speed up the internal heat relief valve to prevent excessive spring deformation of the spring temperature, affecting the normal spring sensitivity. Commonly used safety valve for the operating temperature, such as carbon steel WCB (C) ≤ 350 ℃; chromium-molybdenum steel 1Cr5Mo (I) ≤ 500 ℃; chromium molybdenum vanadium steel 15CrMoIV (V) ≤ 540 ℃, the temperature exceeds 350 ℃, safety Valve basically need to be equipped with a radiator. Spring-loaded safety valve with radiator is used for overheating saturated steam at high temperature and high pressure. It is suitable for power boiler, cracking furnace, once-through boiler, reheater, power station boiler, waste heat recovery boiler equipment and power, steel, metallurgy and other industries.

Marine Electro-hydraulic Windlass

The windlass is installed on the main deck of the ship's bow, which is used for the ship to lift the anchor and drop the mooring cable.
Windlass can be divided into manual, electric, hydraulic, pneumatic, etc. according to the driving form.

The windlass can be divided into several specifications such as φ12--φ120mm according to the diameter of the anchor chain.
Windlass can be divided into single-sided and double-sided according to the distribution of drums.
The windlass is mainly composed of base, bracket, chain wheel, brake, chain wheel, gearbox, electric control system (except manual windlass), etc. Electric windlasses have electric motors, and hydraulic windlasses have hydraulic pump stations.
The main technical indicators of the windlass include the diameter of the anchor chain, the nominal speed of the anchor, the rated load, the supporting load, several levels of speed change, electrical system, etc. The installation of the windlass on the ship should ensure that the wrap angle between the anchor chain and the sprocket is 117-120°.
Electric windlass
The electric motor directly drives the windlass, and the drive shaft is driven by the gear box to work, and the structure is simple; it is generally suitable for windlasses with an anchor chain diameter of 16mm-93mm.
hydraulic windlass
It is suitable for windlass with anchor chain diameter of 16mm-120mm. Hydraulic windlasses are also called electro-hydraulic windlasses. It drives the oil pump with a motor, drives the motor with high-pressure oil, and then drives the transmission gear through a reducer (or no reducer). To make the windlass run, its structure is relatively compact and its volume is small. Now there has been an automatic hydraulic windlass, which is equipped with an anchor chain length sensor. When the anchor chain needs to be thrown out, the windlass will automatically stop; , can automatically decelerate; the anchor will automatically stop when it enters the anchor chain drum and is properly received.

Marine Electro-Hydraulic Windlass,Windlass Anchor,Electric Windlass,Manual Windlass

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